Green’s Dictionary of Slang

tilt-boat n.

[SE tilt-boat, ‘a large rowing boat having a tilt or awning, formerly used on the Thames, esp. as a passenger boat between London and Gravesend’ (OED)]

a promiscuous woman; a prostitute.

Show quotations
[UK]Dekker & Webster Northward Hoe V i: Your wife is a Tilt-boate, any man or woman may goe in her for money ; she’s a Cunny-catcher.