pfft

contempt

Disdainful disregard

• scornHostile dismissive feeling
• sneerScornful expression
• derisionContemptuous mockery

condescension · haughtiness · supercilious · snooty · belittlement · disparagement · mockery · ridicule · sarcasm · scoff

brushoff

Abrupt, curt rejection

• shrugShoulder gesture of uncertainty
• whateverExpression of apathy
• disregardWillful lack of attention

ignore · rebuff · snub · spurn · rejection · neglect · overlook · wave-off · eye-roll · unimpressed

fizzle

Fail after promising start

• hissSharp sibilant sound
• whooshRushing air sound
• leakEscape through a breach

puncture · flat · escape · sputter · release · wheeze · balloon · tire · airbed · blow-out

doubt

Lack of firm belief

• disbeliefRejection of truth claims
• incredulityInability to accept something
• cynicismDistrust of human sincerity

distrust · suspicion · dubiousness · questioning · unconvinced · misgivings · wariness · side-eye · please

sputter

Emit irregular popping sounds

• splutterSpeak confusedly, in bursts
• tongueOral muscle for taste
• tauntingInsulting to provoke

teasing · childish · playful · blowing · spit-take

• interjectionsah, hey, aha, sheesh, oh
• whatevermeh, shrug, so what, who cares, don't care
• onomatopoeiabang, bam, boom, buzz, clang
• comic book soundspow, bam, wham, zap, kapow
• disgustdisgust, disgusting, disgusted, revulsion, repulsion
• gesturesgesture, hand gestures, applause, hand raise, tap on shoulder