Wow, How I Met Your Mother is popular. An hour after tonight's episode, this phrase was the top search. If you're curious, the LvM is a pickup technique in which you litter the internet with dozens of pages about a unique, fake name and subtly encourage a girl to Google your name, where she finds stories about your brilliance and wealth. You can figure out the rest.
I feel like this was a challenge amongst the writers to see how quickly they could hit the top of Google Trends. It also reminds me that the show's audience skews young. It doesn't have the broad appeal of Friends, but that's part of what makes this the Friends of the aughts.