Swan"-up`ping (?), n. A yearly expedition on the Thames to take up
young swans and mark them, as by Companies of Dyers and Vintners; --
called also swan- hopping. [Eng.] Encyc. Brit.
Swap (?), v. t. [imp. & p. p. Swapped (?); p. pr. & vb. n. Swapping.]
[OE. swappen to strike; cf. E. to strike a bargain; perh. akin to E.
sweep. Cf. Swap a blow, Swap, v. i.] [Written also swop.] 1. To strike;
-- with off. [Obs. or Prov. Eng.] "Swap off his head!" Chaucer.
2. To exchange (usually two things of the same kind); to swop.
[Colloq.] Miss Edgeworth.
Swap, v. i. [Cf. Swap, v. t.] 1. To fall or descend; to rush hastily or
violently. C. Richardson (Dict.).
All suddenly she swapt adown to ground.
Chaucer.
2. To beat the air, or ply the wings, with a sweeping motion or noise;
to flap.
Swap, n. [Cf. G. schwapp, n., a slap, swap, schwapp, schwapps, interj.,
slap! smack! and E. swap, v.t.] 1. A blow; a stroke. [Obs. or Prov.
Eng.]