The Collaborative International Dictionary of English v.0.48:
Slip \Slip\, v. i. [imp. & p. p. Slipped; p. pr. & vb. n.
Slipping.] [OE. slippen; akin to LG. & D. slippen, MHG.
slipfen (cf. Dan. slippe, Sw. slippa, Icel. sleppa), and fr.
OE. slipen, AS. sl[imac]pan (in comp.), akin to G. schleifen
to slide, glide, drag, whet, OHG. sl[imac]fan to slide,
glide, make smooth, Icel. sl[imac]pa to whet; cf. also AS.
sl?pan, Goth. sliupan, OS. slopian, OHG. sliofan, G.
schliefen, schl?pfen, which seem to come from a somewhat
different root form. Cf. Slope, n.]
1. To move along the surface of a thing without bounding,
rolling, or stepping; to slide; to glide.
2. To slide; to lose one's footing or one's hold; not to
tread firmly; as, it is necessary to walk carefully lest
the foot should slip.
3. To move or fly (out of place); to shoot; -- often with
out, off, etc.; as, a bone may slip out of its place.
4. To depart, withdraw, enter, appear, intrude, or escape as
if by sliding; to go or come in a quiet, furtive manner;
as, some errors slipped into the work.
Thus one tradesman slips away,
To give his partner fairer play. --Prior.
Thrice the flitting shadow slipped away. --Dryden.
5. To err; to fall into error or fault.
There is one that slippeth in his speech, but not
from his heart. --Ecclus. xix.
To let slip, to loose from the slip or noose, as a hound;
to allow to escape.
Cry, "Havoc," and let slip the dogs of war. --Shak.