latch onto
verb1
Idiomatic To obtain, acquire or get and keep hold of something.
- They latched onto the idea and gave it up only reluctantly.
- And there was time for two more All Blacks tries, first flanker Adam Thomson flopping over after a break by Jimmy Cowan, before Williams latched onto a clever cross-kick by Kahui for his second touch-down with three minutes remaining.2011 September 16, Ben Dirs, “Rugby World Cup 2011: New Zealand 83-7 Japan”, in BBC Sport:
2
Idiomatic To approach or stay close to someone, especially in a manner perceived as bothersome.
- He was looking for someone to talk to and latched onto me for some reason.