An extremely long verb, (pronounced "suck-a-make-out") it simply means that you suck at making out, usually used when describing people in Jr. High that don't know anything about kissing.
MEREDITH: Did you hear about PEYTON and CONOR?
FRANCES: Yeah, i heard they kissed last night.
MEREDITH: They probably just pulled a suckamakeout.
1: A Sick-as Dj. Makes hip hop Mix tapes, has this lil sound he makes that goes 'sickamore' may have heard it on some song downloads. Quite amusing really.
2: A type of tree that must be extinct by now cos noone has heard of them nowadays.
1: Yo...dis dj sickamore **Sickamore** And this be tha new track from my mayne 5-0 cent. Its goin Down Dogg!
2: Holy Shiiit that was the last sickamore tree alive and that redneck just chopped it down....bummer!