Letters that make slip-up
s, l, p, i, u are letters that make 'slip-up'
1 possible definitions for 'slip-up'
Under this definition, slip-up is a noun and has the following properties:
slip, miscue, parapraxis have the same meaning as 'slip-up'
Freudian slip is a type of slip-up.
trip up, slip one's mind, err, slip up, slip, stumble, mistake are derivatives of 'slip-up'.