/slip"streem'/ , n. Also, slip stream .
1. Aeron. the airstream pushed back by a revolving aircraft propeller. Cf. backwash (def. 2), wash (def. 35).
2. the airstream generating reduced air pressure and forward suction directly behind a rapidly moving vehicle.
v.i.
3. to ride in the slipstream of a fast-moving vehicle.
[ 1910-15; SLIP 1 + STREAM ]