This is the 10608th most frequent Spanish word.
culo
"Bottom" or "buttocks" (informal).
Used to refer to the body part (buttocks) in an informal, colloquial context.
Ese niño siempre se cae de culo al intentar caminar sobre hielo.
That boy always falls on his butt when trying to walk on ice.
Used figuratively to emphasize busyness and inability to take care of oneself.
Estoy trabajando como un burro para poder pagar las facturas; no tengo tiempo ni para rascarme el culo.
I'm working like a donkey to pay the bills; I don't even have time to scratch my butt.
Used metaphorically to describe a poor or ungraceful condition or movement.