nickel and dime

cumulative

Increasing by successive additions

• gradualDeveloping slowly over time
• piecemealIn separate stages
• bit-by-bitIn gradual increments

death by a thousand cuts · chipping away · erosion · attrition · creeping · mounting · accruing · compounding · adding up · snowballing

overcharge

Demand excessive payment

• gougeConcave carving blade
• rip-offGrossly overpriced exchange
• fleeceWool still on sheep

swindle · extort · bleed · squeeze · exploit · profiteer · highway robbery · bilk · cheat · soak

trivial

Lacking significance or weight

• triflingOf no real importance
• small-timeOf little significance
• piddlingInsignificantly small

picayune · niggling · penny-ante · minor · insignificant · pettifogging · nitpicking · quibbling · cheap · stingy

aggravating

Causing irritation or worsening

• irritatingCausing mild frustration
• annoyingCausing mild irritation
• exasperatingIntensely irritating

maddening · vexing · irksome · pestering · badgering · hassling · nagging · tedious · wearing down · grinding

• Insignificant thingstrivial, minor, small, tiny, negligible
• money idiomsarm and a leg, break the bank, penny pincher, cheapskate, tightwad
• greedgreed, avarice, covetousness, cupidity, materialism
• idiomstime flies, hit the sack, seize the day, ring a bell, break a leg
• stinginessstinginess, miserliness, miserly, penny-pinching, stingy
• thrift sayingspenny saved, penny wise, pinch pennies, penny pincher, live within means