Corporate for "I forgot what this is about but I need to make noise before someone notices".
To briefly communicate or meet with someone. The phrase that ensures another pointless meeting gets scheduled. Typically used when someone wants to seem engaged without actually committing to anything. If someone says, "Let’s touch base next week," they’re stalling.
"Just wanted to touch base, aka remind you I exist and need an update."
"Can we touch base sometime this week? I’ve scheduled 30 minutes on your calendar labeled ‘Quick Sync’ that will absolutely ruin your afternoon."