Full-on Edit Meaning

1.

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."

See intense, extreme, hardcore, full on

2.

<adverb> British Slang;

1) Synonymous with 'absolute', 'positive', 'total' etc...

"Jonathan is an absolute, full-on knob-head!"