Entry 2 senses · 2 variants Webster, 1913 Boohoo /(bo͞o`ho͞o")/ · Boo·hoo · IPA v. i. n. 01 v. i. To bawl; to cry loudly. imp. & p. p. Boohooed; p. pr. & vb. n. Boohooing 1. To bawl; to cry loudly.[Low] 02 n. The sailfish; -- called also woohoo. 1. The sailfish; -- called also woohoo.(Zool.) Also: woohoo