The phrase "big booster" refers to something or someone that provides a significant amount of support, aid, or motivation. It suggests that the thing or person mentioned greatly helps or boosts others. Full definition
Even the cryptocurrency's biggest boosters admit it is probably too early to be useful to the mainstream. (entrepreneur.com)
Marriage Equality will soon be back on New York's burner, the NYDN reports: Sen. Thomas Duane (D - Manhattan, pictured), the Senate's biggest booster of gay marriage, said he'll introduce legislation «within weeks» to legalize sam... Read (towleroad.com)
«What he really should be doing is announcing that he will work with the legislature on a more comprehensive bill,» says State Assemblyman Richard Gottfried of Manhattan, medical marijuana's biggest booster in Albany. (thenation.com)