lam·ba·da 
(ləm-bädə, läm-bädä)
(ləm-bädə, läm-bädä)n.
1. A Brazilian ballroom dance in which the partners press against each other tightly and gyrate sensually.
2. The music for this dance.
[Portuguese, beating, lashing, from past participle of lambar, to beat, variant of lombar, probably from lombo, side, flank (of a horse), from Latin lumbus, loin.]