Yes, kink is a Scrabble word!

Verb

1. Curl tightly

2. Form a curl, curve, or kink

Noun

1. A painful muscle spasm especially in the neck or back (`rick' and `wrick' are British)

2. A sharp bend in a line produced when a line having a loop is pulled tight

3. A person with unusual sexual tastes

4. An eccentric idea

5. A difficulty or flaw in a plan or operation