I'm wondering about something (I had to handle some pushback on my poposal...)

[Bestnsync]

i'm reading some dialogues on ESL site.
Advaced lever is quite difficult for me to understand
Example,

1) i had to handle some pushback on my poposal
(= i had to manage some complains about my idea)

2) I tried to ping you earlier
(= I tried to contact you ealier)

there are Two types of expressions which have the same meanings above.
then, most Native speakers prefer using the first one to the second when they speak?
are these words(pushback and ping) more common?

pushback = complains, and ping = contact

just should i memorize these expressions to understand it?

[Mister Micawber]

.
No. 'Complaints' and 'contact' are common and standard; 'pushback' and 'ping' are slang (in fact, I have never heard them).
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Native English teacher at Mister Micawber's