Bigger than the Note but not as bright. Not saying anything. We wouldn't want to get this guy upset. So, careful with the F-word. And no, not phablet, obviously. Though at 8mm, the Samsung Galaxy Mega technically isn't fat.
There has been no such thing as size limit for Samsung but is the Galaxy Mega 6.3 already pushing it too far? The massive 6.3" screen puts the bigger one of the Mega brothers well into the upper range of phablets and almost into tablet territory.

Samsung Galaxy Mega 6.3 official images
The Samsung Galaxy Mega 6.3 - as in a 6.3" screen - is the bigger and better half of the Mega pair, making an interesting alternative to the Galaxy Note line of phablets. It's bigger than the first two (most likely bigger than even the Note III as well) but actually more affordable.
There were of course some inevitable cuts, mainly in the display and chipset area, but the Mega 6.3 still boasts LTE connectivity, Android 4.2.2 with exclusive TouchWiz features like Multi-window and Air View among other goodies the Galaxy S4 has, including the IR remote control functionality.

Samsung Galaxy Mega 6.3 at a glance:

• General: Quad-band 2G/quad-band 3G/Optional LTE connectivity
• Form factor: Touchscreen bar phone
• Dimensions: 167.6 x 88 x 8mm, 199 g
• Display: 6.3" 16M-color TFT capacitive touchscreen with a resolution of 720 x 1280 pixels (233ppi)
• Chipset: Qualcomm Snapdragon 400, 1.7GHz Krait CPU, Adreno 305 GPU, 1.5GB RAM
• OS: Android 4.2.2 (Jelly Bean)
• Memory: 8/16GB storage, microSD card slot
• Still camera: 8 megapixel auto-focus camera, face detection, touch focus and image stabilization; 1.9MP front facing camera, video-calls
• Video camera: Full HD (1080p) video recording at 30fps
• Connectivity: Wi-Fi a/b/g/n/ac, Wi-Fi hotspot, Bluetooth 4.0, standard microUSB port with MHL features (TV Out, USB host), GPS receiver with A-GPS and GLONASS, 3.5mm audio jack, NFC, Infrared port
• Battery: 3,200 mAh
• Misc: TouchWiz UI, Air View, Impressively rich video/audio codec support, built-in accelerometer, Smart stay and Smart rotation eye-tracking, S Health

While the screen is less than stellar, 233ppi is better than what the Galaxy Grand got and on par with the Galaxy S III mini. It's the chipset we're more worried about - it's a better version of the one Nokia uses in the Lumia 520. Sure, the CPU runs at a much higher clockspeed (70% higher) and there's three times the amount of RAM, but the Galaxy Mega 6.3 will have to really bring its A game to get anyone impressed.