It means to make-out voraciously. Term is used more when people see you doing it publicly. Not necessarily a bad thing but people say it more disparagingly.
Jesus, get a room - no one wants to see you suck face right before I order my food, ugh!
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hardcore making out. Lots of tongue action
He likes to suck face with his lady friends
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making out, kissing excessively and heavily
I had to look at the clock, I had no idea what time it was because we were sucking face for so long.
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to kiss for a long period of time, may include (hopefully) some biting and licking of the neck and ears. non-pretty way of saying make out.
Nineteen-year-old Louisa Almedovar and her 22-year-old boyfriend Rich Langley, both of Vineland, New Jersey, USA, sucked face non-stop for a record 30 hours, 59 minutes and 27 seconds on December 5, 2001
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To kiss so hard/intensely that one or both partner(s) are literally sucking each others faces
Man those people sucking face over there are grossin' me out!
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to make out with someone hardcore...
i'm trying to listen to my music but i can't because them to are sucking face in my backseat
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I gave my husband some suck face when I got home from work.
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