When the Blackjack dealer Stevie is tipped by Ruth, he picks up the chip, taps it on the table, and then puts it in his right-hand pants pocket. However, tips are split among dealers and are not tips for individuals (Poker dealers are often an exception). Putting them in your pocket may also be considered theft against the other dealers and the casino itself.
Ruth supposedly tips the Blackjack dealer $20 at Sam's suggestion, but she only throws him a single white chip. Not only is that chip a $1 denomination at a Las Vegas casino ("The simplest color - the lowest value chip."), but there are also no $20 chips. Standard chip denominations are $1, $2.50 (rare), $5, $10, $25, $50, $100, $500, $1,000, and $5,000 on a typical casino floor. There are higher valued ones, as well as casino plaques and special tournament chips, but never a $20 chip.
When Mark was talking about Randy taking his first steps and Debbie was shocked it happened after she left, he said he was "a baby, not Michigan J. Frog". He is referring to the frog in the Looney Tunes short, "One Froggy Evening" and how he would only perform for the person who discovered him and nobody else. Though technically that has been the name of that frog since the 1970s (named for "The Michigan Rag", the one original song written for the cartoon), it didn't become widely known to the public until the mid 1990s, just before the old WB Television Network launched (as he became the mascot for the network). Mark would more likely have called him either "the frog from One Froggy Evening" or "the singing frog in that Looney Tunes short", or something else similar.