шлёпнуться v | phrases
gener.	plop; flop; plonk; plunk; splash; tumble; plop down (Tony19); plump; fall with a wallop; thud; whop; flop down; drop (e.g., "he dropped into the chair" Рина Грант)
colloq.	hit the ground (with a thud 4uzhoj); pancake (Andrey Truhachev); take a spill (VLZ_58)
dial.,   colloq.	wallop
Gruzovik,   colloq.	hit against (pf of шлёпаться); knock against (pf of шлёпаться); fall with a plop (pf of шлёпаться)
Makarov.	go plash; go down with a wallop; plonk down; plump down; splash into
Makarov.,   colloq.	plunk down

шлёпнуться: 16 phrases in 2 subjects

General subject	8
Makarov	8