1. (noun) a drawback or difficulty that is not readily evident

• catch

2. (noun) something unspecified whose name is either forgotten or not known

• doodad
• doohickey
• doojigger
• gismo
• gizmo
• gubbins
• thingamabob
• thingamajig
• thingmabob
• thingmajig
• thingumabob
• thingumajig
• thingummy
• whatchamacallit
• whatchamacallum
• whatsis
• widget

3. (noun) any clever maneuver

• device
• twist

1. (noun) a drawback or difficulty that is not readily evident

• drawback

2. (noun) something unspecified whose name is either forgotten or not known

• stuff

3. (noun) any clever maneuver

• maneuver
• manoeuvre
• tactical maneuver
• tactical manoeuvre

1. (noun) any clever maneuver

• fast one
• trick
• mnemonic

1. (noun) a drawback or difficulty that is not readily evident

• catchy
• tricky