Adjective. A particularly intense or extreme experience, whether good or bad.
"The party got a bit full-on when those randoms turned up with all that crystal meth."

"He told me he loved me...I've only known him three weeks so it was all a bit full-on."
by Muffin Freak March 02, 2006
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<adverb> British Slang;

1) Synonymous with 'absolute', 'positive', 'total' etc...
"Jonathan is an absolute, full-on knob-head!"
by Stuart Fletcher November 15, 2004
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IN BRIEF: alkied, bent, drunk, intoxicated, loaded, lushed, tipsy, under the influence, etc.
We getting full at the party tonight. I know you don't wanna miss a hangover.
by Mr. Terrence L. Trezvant October 13, 2009
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to have had enought to eat
the gerbil won't come out because he's had enough to eat
by Turd Ferguson November 02, 2003
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When something is filled up so much with something else you cant put anything in it.
That cup is full of water!
by URB4N D1C710N4RY April 09, 2021
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1. something extreme
2. something intense
3. something in the face
4. anything free
For example, you know how I love
mountain biking? Well I might say, "Yeah once we hit that trail it was full on, full on."

"Bro, meet us up there, it's going to be full on full on."

"Free drinks, full on, full on"
by Dr. Tom January 08, 2004
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