Movements

вилять [no Pf.] задомi to swing, to swish one's butt
Ну и походка у него! Виляет задом, как проститутка! Look at the way he walks! He swings his butt like a prostitute!
вскидывать/вскинуть задомi;
бить/забить [Pf-begin] задомi
to buck
NB The above two expressions are usually used to describe movements of a horse.
подбрасывать [no Pf.] задa to bounce one's rump
садиться/сесть на задa to sit on one's haunches
NB The above two expressions are usually said of an animal.
хлопать/похлопать Na по задуd;
шлёпать/пошлёпать Na по задуd
to slap N's behind
NB The above two expressions refer to a gesture that is often interpreted as condescending or as a crude pass at a woman.