FLOP

(FALL) [verb] [I usually + adverb or preposition] -pp- - to fall or drop heavilyA new-born baby's head flops backwards if you don't support it.I just want to flop into bed and go to sleep!My hair keeps flopping over/into my eyes - I think I'll tie it back.(informal) When she gets home from school, she's so tired all she can do is flop (down) in front of the television!