slit

Short definition from Wiktionary

Noun

1. 1
   A narrow cut or opening; a slot.
2. 2
   The vulva.
3. 3
   A woman, usually a sexually loose woman; a prostitute.

Verb

1. 1
   To cut a narrow opening.
2. 2
   To split into strips by lengthwise cuts.
3. 3
   To cut; to sever; to divide.

Adjective

1. 1
   Having a cut narrow opening.