tiptop

Short definition from Wiktionary

Noun

1. 1
   The very topmost point.
2. 2
   The highest or utmost degree; the best of anything.
3. 3
   Oral stimulation of the male member, a blowjob (more commonly top).
4. 4
   A freeze pop, irrespective of brand.

Adverb

1. 1
   Excellently; in a first-rate manner.