Bum (?), n. [Contr. fr. bottom in this sense.]
The buttock.
[Low]
Shak.
© Webster 1913.
Bum, v. i. [imp. & p. p. Bummed (); p. pr. & vb.n. Bumming ().] [See Boom, v. i., to roar.]
To make murmuring or humming sound.
Jamieson.
© Webster 1913.
Bum, n.
A humming noise.
Halliwell.
© Webster 1913.