whop whop whop
sound of a helicopter. Also: ‘wuppa wuppa’
‘whumpa-whumpa-whumpa-whumpa’
‘whup-whup-whup’
‘flac-flac-flac’
‘chakk-chackk-chak-chak, chak-a-chak-akk-chk-chk-chk’
‘DUBDUBDUBDUBDUBDUBDUB’
‘THITH-THITH-THITH’
‘batabatabatabata’
‘tocotocotocotoco’
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