What is the meaning of the expression "We can table this"?

In American English, to table something means to postpone discussion on something. It might mean to postpone it indefinitely, but usually it just means that the discussion should be resumed at a later date. (As others have pointed out, in British English it means the exact opposite. Two countries divided by a common language, as someone said.)

Edit:

Etymonline notes:

table (v.) in parliamentary sense, 1718, originally "to lay on the (speaker's) table for discussion," from table (n.). But in U.S. political jargon it has the sense of "to postpone indefinitely" (1866). Related: Tabled; tabling.

That may be true for political jargon, but in every business meeting I've ever been involved with, to "table" something usually means the issue wasn't going to go away but that we were agreeing not to talk about it during the current meeting.

It depends who is saying it. Americans mean "let's postpone discussing it". Other English speaking people mean "let's begin discussing it".

Colloquially, one can table a suggestion for a group to decide on.

(From the UK).

According to http://www.robertsrules.com/faq.html#12 (Roberts Rules of Order):

The purpose of the motion to Lay on the Table is to enable an assembly, by majority vote and without debate, to lay a pending question aside temporarily when something else of immediate urgency has arisen or when something else needs to be addressed before consideration of the pending question is resumed. In ordinary societies it is rarely needed, and hence seldom in order. [RONR (11th ed.), pp. 209-18; see also p. 127 of RONRIB.]