The most size (large) imaginable (i.e. good)
Yo did you go out last night?
"Yh geezer we stayed out till 7AM and slept in the gym it was Sizemundo"
Usually pronounced (But-Lift-AH)
Someone who is a habitual shagger
Derived from the verb "to butt-lift" (see elsewhere on Urban Dictionary
You're in late, where you been Butt-Lifter?