strap-on

Meanings

1. That can be attached using one or more straps.
2. Of a booster rocket, that is mounted on the outside of a launch vehicle (typically around the first stage) to provide an additional boost at lift-off, ultimately separating after the first few minutes of ascent.

1. A strap-on booster.
2. An artificial phallus attached with a strap, usually a dildo.
3. Synonym of keytar (“keyboard supported by a strap around the neck and shoulders”).

Etymology

From strap + on.